There is a great feature here, but most of people are not using it, it's called Thread Rating which adds a score beside the thread, to help users to see if the thread is good and deserve reading or not.

To rate a thread, select "Rating" menu from the top of the thread: and select your rating from the drop-down menu as the following:

5 = (Best)
4 =
3 =
2 =
1 = (Worst)

Now, if we started to use it with every thread, the board will be better and only the excellent threads will be posted